Wind turbine



FIG. 1 is a front right perspective view of a wind turbine showing our new design;

FIG. 2 is a rear right perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a side elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a side elevation view thereof, the opposite of that in FIG. 4;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The portions shown in broken lines are for illustrative purposes only, and form no part of the claimed design. 

The ornamental design for a wind turbine, as shown and described. 